JP2001010329A - Air-conditioning device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a cost by a method wherein an air mix door for a front seat and an outlet mode switching door are used in common, in an air- conditioning device having a rear seat independent control function or having no said function. SOLUTION: A lower case to contain the lower side of a heat-exchanger 13 for heating is removably assembled to the under surface sides of body cases 11a and 11b to contain the upper side of an approximately vertically installed heat-exchanger 13 for heating, an air mix door 20 for a front seat, and outlet mode switching doors 26 and 31 for a front seat. This constitution forms an air-conditioning device having a rear seat independent control function by assembling a lower case provided with an air flow passage for a rear seat and forms an air-conditioning device having no rear seat independent control function by assembling a lower case serving only as a cover having no air flow passage for a rear seat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle, and more particularly, to an air conditioner that blows out conditioned air only to a front seat and an air conditioner that blows conditioned air to both a front seat and a rear seat. This is related to sharing parts.

[0002]

2. Description of the Related Art There are various types of air conditioners for vehicles, such as a type that blows conditioned air only to the front seat side and a type that blows conditioned air to both the front seat side and the rear seat side.
Japanese Patent No. 58144 proposes an air conditioner of such a type in which the number of components that can be commonly used is increased to reduce the cost. FIGS. 5 and 6 show an air conditioner proposed in the above publication. FIG. 5 shows an air conditioner that controls the left and right outlet air temperatures of the front seat independently (front seat left and right independent control), and FIG. The device having the function of FIG. 5 is further provided with a function of independently controlling the rear-seat outlet air temperature and blowing air to the rear seats (rear seat independent control). At this time, the heater core 13, the air mix door 2
0, 38, and the case for storing the blowout mode switching doors 26, 41, etc., are divided into three parts, and the central case 1
By replacing 1c and 11d, any type of air conditioner can be used, and the cases 11a and 11b on both sides of the three divided cases can be commonly used.

[0003]

However, in the prior art described above, the front air flow path and the rear air flow path are separated by the partition wall 34 provided in the central cases 11c and 11d. The doors 20 and 38 are divided in the axial direction of the rotation shaft 21. For this reason, in the apparatus shown in FIGS. 5 and 6, the width of the front air passage is different, and accordingly, the front air mix door 20 and the front air outlet mode switching door 26 disposed in the front air passage are provided. They cannot be standardized.

[0004] The present invention has been made in view of the above points,
To reduce costs, the air mix door for the front seat and the air outlet mode switching door for the front seat of the air conditioner with independent rear seat control function and the air conditioner without the rear seat independent control function can be shared. Aim.

[0005]

To achieve the above object, according to the first aspect of the present invention, a cooling heat exchanger (12) is provided.
A heating heat exchanger (13) disposed substantially vertically downstream of the cooling heat exchanger (12), and an air mixing door (20) for a front seat for adjusting a flow rate of hot air and cold air. A plurality of front-seat outlet openings (25, 29, 30) through which air mixed with hot and cold air flows, and a front-seat opening / closing opening for the front-seat outlets (25, 29, 30). In a vehicle air conditioner provided with a blowing mode switching door (26, 31), an upper side of a heating heat exchanger (13), a front seat air mix door (20), and a front seat blowing mode switching door (26). , 31) for storing the main body cases (11a, 11a).
The lower case (11c, 11d) for housing the lower side of the heating heat exchanger (13) is detachably attached to the lower surface side of b).

According to this, an air conditioner without a rear seat independent control function is provided by assembling a lower case (11d) as a mere cover without a rear seat air flow passage to a main body case (11a, 11b). be able to. Further, as in the second aspect of the present invention, the rear-seat cold air bypass passage (32) and the rear-seat outlet openings (43, 44) are formed, and the rear-seat air mix door (38) is housed. The lower case (11c, 11d) is
a, 11b), it is possible to provide an air conditioner having a rear seat independent control function.

As described above, the lower cases (11c, 11c)
Since the air conditioner with or without the rear seat independent control function can be configured by the selective use of d), the main body case (11a, 11
The air mix door (20) for the front seat and the front air outlet mode switching doors (26, 31) housed in (b) can be shared, and the cost can be further reduced.

[0008] The reference numerals in parentheses of the above means indicate the correspondence with the specific means described in the embodiment described later.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show an embodiment, in which the air conditioners shown in FIGS. 1 and 2 are of the type in which a front seat left / right independent control function is added to a rear seat independent control function. ,
Reference numeral 4 denotes an air conditioner of a type in which a rear seat independent control function is omitted from the air conditioners of FIGS.

FIGS. 1 and 2 show an air conditioning unit in a ventilation system of a vehicle air conditioner. The ventilation system is roughly divided into a blower unit (FIG. 1). (Not shown) and an air conditioning unit 10. The blower unit is arranged offset from the center to the passenger seat side in the lower part of the instrument panel in the passenger compartment, while the air conditioning unit 10 is arranged in the lower part of the instrument panel in the passenger compartment in the lateral direction of the vehicle. It is arranged substantially at the center.

As is well known, the blower unit comprises an inside / outside air switching box and a blower for sucking air through the inside / outside air switching box to blow air. The inside / outside air switching box is formed with an outside air introduction port for introducing outside air (outside vehicle compartment air) and an inside air introduction port for introducing inside air (inside vehicle compartment air), and these two introduction ports are opened and closed by an inside / outside air switching door.

The air conditioning unit 10 is specifically shown in FIG.
2 and one common air conditioning case 1
1 is a type in which both an evaporator (heat exchanger for cooling) 12 and a heater core (heat exchanger for heating) 13 are integrally incorporated. The air-conditioning case 11 is made of a molded article of a resin such as polypropylene having a certain degree of elasticity and excellent strength. The air-conditioning case 11 is specifically composed of a plurality of divided cases (details will be described later). The plurality of divided cases accommodates the heat exchangers 12 and 13 and devices such as doors to be described later, and then includes metal spring clips and screws. The air conditioning unit 10 is integrally connected by such fastening means.

The air-conditioning unit 10 is arranged in the form shown in FIG. 1 in the front-rear direction and the vertical direction of the vehicle at a substantially central portion below the instrument panel in the vehicle interior. Air conditioning case 1
1, an air inlet 14 is formed on the side surface of the most forward part of the vehicle. The blast air from the blower unit flows into the air inlet 14.

The evaporator 12 is disposed in the air conditioning case 11 immediately after the air inlet 14. This evaporator 1
Numeral 2 is vertically arranged so as to cross the passage in the air conditioning case 11 in a thin form in the vehicle front-rear direction.
Therefore, the blast air from the air inlet 14 flows into the front surface of the evaporator 12 extending in the vehicle vertical direction. As is well known, the evaporator 12 cools the conditioned air by absorbing the latent heat of evaporation of the refrigerant in the refrigeration cycle from the conditioned air.

A heater core 13 is disposed downstream of the evaporator 12 in the air flow direction (rear side of the vehicle) at a predetermined interval. The heater core 13 is vertically disposed at a lower side in the air-conditioning case 11 so as to be slightly inclined rearward of the vehicle. The width of the evaporator 12 and the heater core 13 in the vehicle left-right direction is designed to be substantially equal to the width of the air conditioning case 11.

The heater core 13 reheats the cold air that has passed through the evaporator 12, in which high-temperature hot water (engine cooling water) flows, and heats the air using the hot water as a heat source. In the air passage in the air-conditioning case 11, a cool air bypass passage 15 for the front seat is formed above the heater core 13, through which the air (cool air) flows, bypassing the heater core 13.

As is well known, the heater core 13 has a heat exchange core portion 13a composed of a flat tube through which warm water passes and a corrugated fin joined thereto. The channel is partition wall 1
The front and rear passages 18 and 19 are partitioned by the passages 6 and 17. Here, the partition walls 16 and 17 are formed inside the air-conditioning case 11 so as to extend over the entire length in the vehicle left-right direction.

Further, a flat air mix door 20 for a front seat is disposed between the heater core 13 and the evaporator 12. The front-seat air-mix door 20 includes hot air heated in the front-seat passage 18 of the heat exchange core portion 13a of the heater core 13 and cold air that bypasses the heater core 13 through the front-seat cool air bypass passage 15. And adjust the air flow ratio.

The front air mixing door 20 is integrally connected to a rotating shaft 21 arranged in a horizontal direction (vehicle width direction), and is rotatable around the rotating shaft 21 in the vertical direction of the vehicle. I have. This front seat air mix door 2
Numeral 0 denotes a front seat temperature adjusting means for adjusting the temperature of the air blown out to the front seat side in the vehicle cabin by adjusting the air flow rate ratio. Rotary axis 2
1 is rotatably supported by the air conditioning case 11, one end of the rotating shaft 21 projects outside the air conditioning case 11, and is connected to an actuator mechanism using a servomotor or the like via a link mechanism (not shown), The rotation position of the air mix door 20 is adjusted by this actuator mechanism.

On the other hand, in the air-conditioning case 11, a wall surface 22 extending in the vertical direction at a predetermined interval from the heater core 13 is provided on the downstream side of the flow path 18 for the front seat and the heater core 13 (on the rear side of the vehicle). Are integrally formed with the air conditioning case 11. The wall surface 22 forms a front seat warm air passage 23 that extends upward immediately after the heater core 13. The downstream side (upper side) of the front seat hot air passage 23 joins with the downstream side of the cold air bypass passage 15 above the heater core 13 to form a front seat air mixing section 24 for mixing cold air and hot air. are doing.

A defroster opening 25 is formed on the upper surface of the air-conditioning case 11 at a position adjacent to the air mixing section 24 for the front seat. This defroster opening 25
Is air-conditioned air from the air mixing section 24, which is connected to a defroster outlet through a defroster duct (not shown), and from the defroster outlet, wind flows toward the inner surface of the vehicle front window glass. Blow out.

The defroster opening 25 is opened and closed by a flat defroster door 26. This defroster door 26
Is rotated by a rotating shaft 27 arranged in the horizontal direction near the upper surface of the air conditioning case 11. The defroster door 26 switches and opens and closes the defroster opening 25 and the communication port 28. The communication port 28 is a passage for flowing the conditioned air from the air mixing section 24 to the front seat face opening 29 and the front seat foot opening 30 described later.

On the upper surface of the air conditioning case 11, a face opening 29 is provided at a position on the vehicle rear side (closer to the occupant) than the defroster opening 25, and the face opening 29 is provided via a face duct (not shown). The air outlet is connected to a face outlet disposed above the instrument panel, and blows air from the face outlet toward the head of an occupant in the passenger compartment.

Next, in the air conditioning case 11, a foot opening 30 is provided below the face opening 29. The foot openings 30 are opened on the left and right side surfaces of the air conditioning case 11, and air is supplied to the driver's seat side of the front seat and the passenger's feet on the front passenger seat side via left and right front foot outlets (not shown). Blow out.

A flat foot-face switching door 31 is disposed between the openings 29 and 30 so as to be rotatable about a rotating shaft 31a, and the switching door 31 allows the face opening 29 and the foot opening 30 to be rotated. Is switched open and closed. Here, the defroster door 26 and the foot face switching door 31 constitute a front seat blowing mode switching door, and are connected to an actuator mechanism such as a servo motor via a link mechanism (not shown). An interlocking operation is performed by this actuator mechanism.

Next, in the lower part of the heater core 13 inside the air-conditioning case 11, a rear-seat cool air bypass passage 32 for passing cool air from the outlet of the evaporator 12 bypassing the heater core 13 is formed. In the air-conditioning case 11, a wall surface 33 extending vertically in the heater core 13 on the downstream side (vehicle rear side) of the rear seat flow path 19 with a predetermined interval between the heater core 13 and the heater core 13. The rear surface warm air passage 37 is formed integrally with the wall surface 33 and extends downward immediately after the heater core 13.

A flat air-mixing door 38 for a rear seat is arranged rotatably about a rotating shaft 39 at the junction of the hot air passage 37 for the rear seat and the cold air bypass passage 32 for the rear seat. The rear-seat air mix door 38 adjusts the ratio of the amount of hot air from the rear-seat warm air passage 37 to the amount of cool air from the rear-seat cool air bypass passage 32 to adjust the temperature of air blown to the rear seat side in the vehicle compartment. A rear seat temperature adjusting means for adjusting the temperature is constituted. Warm air from the hot air passage 37 for the rear seat and the cool air bypass passage 3 for the rear seat
The cold air from 2 is mixed in the rear-seat air mixing section 40 to become air at a desired temperature.

The rotating shaft 39 is disposed in the horizontal direction (vehicle width direction), and one end of the rotating shaft 39 projects outside the air-conditioning case 11, and is connected to an independent actuator mechanism using a servomotor or the like via a link mechanism (not shown). The rotation position of the rear air mix door 38 is adjusted by the actuator mechanism.

On the downstream side (rear side of the vehicle) of the rear-seat air mixing section 40, a flat rear-seat blowing mode switching door 41 is disposed so as to be rotatable by a rotating shaft 42.
The air having the desired temperature mixed at 0 is supplied to the rear face opening 43 selected by the rear-seat blowing mode switching door 41.
Alternatively, it flows toward the rear side of the vehicle toward the rear foot opening 44, and further passes through a connection duct (not shown) from the face air outlet for the rear seat or the foot air outlet for the rear seat to the head of the rear seat occupant. Blow out to the side or feet.

Rotating shaft 4 of rear-seat outlet mode switching door 41
Numeral 2 is rotatably supported by the air conditioning case 11, and one end of the rotating shaft 42 projects outside the air conditioning case 11, and is connected to an independent actuator mechanism using a servo motor or the like via a link mechanism (not shown). The operating position of the rear-seat outlet mode switching door 41 is independently set by the actuator mechanism.

The air-conditioning case 11 is provided with the air inlet 1
The case is divided into first and second cases (body cases) 11a and 11b having a symmetric shape except for the presence or absence of the lower case 4 and a lower case 11c detachably mounted below the two cases 11a and 11b. The broken line a in FIG.
1A and 11B show a dividing line between the lower case 11c and the lower case 11c. Specifically, FIG. 1 shows upper end surfaces of partition walls 16 and 17 assembled to the lower case 11c, and an inlet 32a of a rear-seat cool air bypass passage 32. Is divided by

The lower side of the heater core 13 is housed in the lower case 11c, and a rear seat flow path 19 of the heater core 13 is provided.
Are located in the lower case 11c. In the lower case 11c, a rear-seat cool air bypass passage 32 and a rear-seat hot air passage 37 which form a rear-seat air flow path are formed, and a rear-seat air mix door 38 and a rear-seat outlet are formed. A mode switching door 41 is provided.

On the other hand, the upper side of the heater core 13 is housed in the first and second cases 11a and 11b.
The third front seat channel 18 is composed of the first and second cases 11a and 11b.
It is located within. Further, the front-seat cold air bypass passage 15, the front-seat hot air passage 23, and the front-seat air mixing section 24, which constitute the front-seat air flow path, are first and second.
It is formed in the cases 11a and 11b. Further, the evaporator 12, the front and rear seat air mix door 20, the defroster door 26, and the foot face switching door 31 are arranged in the first and second cases 11a and 11b.

The air passage for the front seat is provided in the first case 11.
a and the second case 11b is divided into two parts by a partition wall 34 sandwiched between the two. That is, the partition wall 34
The first case 11a and the second case 11b extend from the portion immediately after the evaporator 12 toward the downstream side of the air flow (the rear side of the vehicle) to the rear end of the first case 11a and the second case 11b.
From the portion to the upper end of the first case 11a and the second case 11b on the vehicle side. As a result, the front air flow path from the portion immediately after the evaporator 12 to the front seat openings 25, 29, 30 has a driver seat air flow path 100 on the right side of the vehicle and a driver air flow path 100 on the left side of the vehicle. It is divided into a passenger seat side air passage 101.

The front seat air mix door 20 is
Driver-side air flow path 100 and passenger-side air flow path 101
The rotation position of the driver-side air mix door 20 and the passenger-side air mix door 20 are independently controlled by separate actuator mechanisms, so that the driver-side air-outlet temperature and the passenger-side air mix door 20 are controlled independently. The side outlet air temperature is adjusted independently.

The rotation speed and amount of the blower unit and each actuator mechanism are automatically controlled by an electronic control unit (not shown) of the air conditioner.

Next, the operation of the air conditioner shown in FIGS. 1 and 2 will be described. This air conditioner comprises a defroster door 26 serving as a front-seat blowing mode switching door and a foot face switching door 3.
By selecting the first operation position, the following blowing modes can be set.

(1) Face blowing mode When the face blowing mode is selected, the defroster door 2
6 is moved to the position indicated by the solid line in FIG.
And the communication port 28 is fully opened. In addition, the foot face switching door 31 is operated to the position indicated by the solid line in FIG. 1 to close the entrance 30a of the foot opening 30. Further, the rear-seat outlet mode switching door 41 is operated to the solid line position in FIG. 1 to open the rear-seat face opening 43 and close the rear-seat foot opening 44.

At this time, when the front seat air mix door 20 is operated to the position indicated by the solid line in FIG. 1, the maximum cooling state in which the front seat passage 18 of the heater core 13 is fully closed and the cold air bypass passage 15 is fully opened is set. You. In this state, when the blower unit and the refrigeration cycle are operated, the blown air from the blower unit flows in from the air inlet 14 and is cooled by the evaporator 12 to become cool air.

In the maximum cooling state, the cool air passes through the cool air bypass passage 15 for the front seat, passes through the air mixing section 24 for the front seat, and the face opening 2 for the front seat through the communication port 28.
Heading to No. 9, cool air blows out from the front seat face outlet toward the head of the front seat occupant. On the other hand, when the rear air mix door 38 is operated to the position indicated by the solid line in FIG.
Since the air flow in the rear seat flow path 19 is cut off, the cool air from the evaporator 12 exit passes through the rear seat cool air bypass passage 32 and passes through the rear seat air mixing unit 40, and then passes through the rear seat air mixing unit 40. The cold air blows toward the face opening 43 from the face outlet for the rear seat toward the head of the rear occupant.

When the front air mix door 20 is operated from the solid line position (maximum cooling position) in FIG. 1 to the intermediate opening position in order to control the temperature of the air blown into the passenger compartment, the air mix door 20 for the front seat is opened. Most of the cool air passes through the front seat cool air bypass passage 15 in accordance with the degree position, and the remaining part of the cool air flows into the front seat flow path 18 of the heater core 13 and is heated to become hot air, thereby forming the front seat warm air. The air passage 23 is raised. Then, the cool air in the front-seat cold air bypass passage 15 and the warm air from the front-seat warm air passage 23 are mixed in the front-seat air mixing section 24 and adjusted to a desired temperature.

Here, the opening positions of the air mixing doors 20 for the front seats, which are arranged one by one in the driver's seat side air flow path 100 and the passenger's seat side air flow path 101, are independently controlled. And the air temperature on the passenger seat side are adjusted independently. Therefore, a front seat left / right independent control function can be obtained.

Similarly, on the rear seat side, when the rear air mix door 38 is operated from the solid line position (maximum cooling position) in FIG.
8, the ratio of the amount of cold air from the cool air bypass passage 32 for the backseat to the amount of warm air from the warm air passage 37 for the backseat can be adjusted. Are mixed and adjusted to a desired temperature.

Accordingly, the vehicle air conditioner of the present embodiment
By independently controlling the operation positions (rotational positions) of the two front-seat air mix doors 20 and the rear-seat air mix door 38, a total of three face air outlets are provided for the front left, right, and rear seats. Temperature can be controlled independently.

(2) Bi-level blowing mode The defroster door 26 is operated at the solid line position in FIG. 1, and the foot face switching door 31 is operated at the intermediate position between the solid line position and the dashed line position in FIG. Both the face opening 29 and the entrance 30a of the front seat foot opening 30 are opened. Also, a rear-seat outlet mode switching door 41.
Is operated from the solid line position in FIG. 1 to the intermediate position, and the rear seat face opening 43 and the rear seat foot opening 44 are operated.
Open together.

Since the bi-level blowing mode is usually used in the middle season of spring and autumn, the air mix door 20 for the front seat is operated to the middle opening position, and the wind adjusted to the desired temperature causes the face opening for the front seat to open. The air is simultaneously blown up and down in the passenger compartment from both the portion 29 and the front seat foot opening 30. Also,
By operating the rear-seat air mix door 38 to the intermediate opening position, the wind adjusted to the desired temperature on the rear seat side can be simultaneously blown from both the face opening 43 and the foot opening 44 up and down in the vehicle compartment. Can blow out.

(3) Foot blowing mode The defroster door 26 is operated from the solid line position in FIG. 1 to a position to open a small amount of the defroster opening 25 and open the communication port 28 (almost fully open). Further, the foot face switching door 31 is operated to the position indicated by the dashed line in FIG. 1 to close the front seat face opening 29 and fully open the entrance 30 a of the front seat foot opening 30. The rear-seat outlet mode switching door 41 is operated to the position indicated by the dashed line in FIG. 1 to close the rear-seat face opening 43 and open the rear-seat foot opening 44.

At this time, when the air mix door 20 for the front seat is operated to the dashed-dotted line position 20a in FIG. 1, the cooling air bypass passage 15 is fully closed, and the front seat flow path 18 of the heater core 13 is fully opened. Is set. In this state, after the blast air from the blower unit 1 flows in from the air inlet 14, passes through the evaporator 12, flows into the front seat flow channel 18 of the heater core 13, and is heated to become hot air. This warm air rises in the warm air passage 23 to reach the air mixing section 24 for the front seat,
From here, it goes to the front seat foot opening 30 via the communication port 28, and from here, warm air blows out toward the feet of the front seat occupant.

At this time, when the rear-seat air mix door 38 is operated to the position indicated by the dashed line in FIG. 1 to completely close the rear-seat cold air bypass passage 32 and fully open the rear-seat hot air passage 37, The warm air heated in the rear seat flow path 19 of the heater core 13 passes through the hot air passage 37 and the rear seat air mixing unit 40 and heads toward the rear seat foot opening 44. Further, warm air is blown from the rear seat foot opening 44 to the foot of the rear occupant through the rear seat foot outlet.

When the two front air mix doors 20 and the rear air mix door 38 are independently operated from the one-dot chain line position (maximum heating position) in FIG. And the mixing ratio of cold air and warm air can be adjusted independently on the rear seat side,
As a result, it is possible to independently control the temperature of the foot outlet air on the left and right sides of the front seat and the rear seat.

In the foot blowing mode, the ratio between the amount of air blown out from the defroster opening 25 and the amount of air blown out from the front seat foot opening 30 is usually 2 to 8 on the front seat side.
However, if the defroster door 26 is operated to a position where the opening degree of the defroster opening 25 is increased and the opening degree of the communication port 28 is reduced as compared with the case of the foot blowing mode, the defroster door 26 is opened. The ratio between the amount of blown air and the amount of blown air from the front seat foot opening 30 can be set to about 5 to 5. This makes it possible to set the foot defroster blowing mode in which the effect of preventing fogging of the window glass is higher than in the foot blowing mode.

(4) Defroster Blowout Mode When the defroster blowout mode is selected, the defroster door 26 is operated to the position indicated by the one-dot chain line in FIG. 1 to fully open the defroster opening 25 and close the communication port 28. At this time, if the front-seat air mix door 20 is operated to the dashed-dotted line position (maximum heating position) 20a of FIG. 23, blows out from the defroster outlet toward the vehicle front window glass through the defroster opening 25 to prevent the front window glass from fogging.

The rear outlet mode switching door 41 is
1 is closed to close the face opening 43 for the rear seat and open the foot opening 44 for the rear seat. At this time, when the rear air mix door 38 is operated to the position indicated by the alternate long and short dash line in FIG. 1 to completely close the cold air bypass passage 32 for the rear seat and fully open the hot air passage 37 for the rear seat, the rear seat of the heater core 13 is opened. The hot air heated in the flow path 19 is
7. The vehicle passes through the rear-seat air mixing section 40 toward the rear-seat foot opening 44. Further, the rear seat foot opening 44
Warm air blows from the rear through the foot outlet for the rear seat toward the feet of the rear passenger.

(Front seat left / right independent control function) Next, FIGS.
The air conditioner of the type not having the rear seat independent control function shown in FIG. Lower case 1 assembled to this device
1d does not include a rear seat air flow path, and functions as a mere cover for closing openings below the first and second cases 11a and 11b. Therefore, the lower case 11d includes the partition walls 16, 17 (see FIG. 1), the rear air mix door 38.
(See FIG. 1), and a rear-seat outlet mode switching door 41.
(See FIG. 1) are omitted. Then, the partition walls 16, 1
7, the air passing through the heater core 13 is all blown out from the front seat outlet through the front seat warm air passage 23.

On the other hand, the lower case 11d is provided on the wall surface 1 for closing the entrance of the rear seat cool air bypass passage 32 (see FIG. 1).
1d1 and a bottom wall surface 11 covering the bottom side of the heater core 13
d2 and a side wall surface 11d3, and a partition wall 11d4 for dividing an air flow path in the lower case 11d into a driver-side air flow path 200 on the right side of the vehicle and a passenger-side air flow path 201 on the left side of the vehicle. The partition wall 11d4 has substantially the same shape as the side wall surface 11d3, and the upper end of the partition wall 11d4 is
It is in contact with the lower end of the partition wall 34 between 1a and 11b. Therefore, the driver's seat side air flow path 100 in the first and second cases 11a and 11b and the driver's seat side air flow path 2 in the lower case 11d.
00 communicates with the passenger side air flow path 101 in the first and second cases 11a and 11b and the passenger side air flow path 201 in the lower case 11d.

The operation of the air conditioner shown in FIGS.
Except that there is no rear seat independent control function and that the blown air is all blown out from the front seat outlet, it is the same as the air conditioner shown in FIGS.

By the way, according to this embodiment, FIGS.
The air conditioner having a rear seat independent control function can be obtained by assembling a lower case 11c provided with a rear seat air flow path and rear doors 38 and 41 as in the air conditioner shown in FIG. On the other hand, like the air conditioner shown in FIGS.
By assembling the lower case 11d as a mere cover having no rear seat air passage, an air conditioner having no rear seat independent control function can be provided. Therefore, not only the first and second cases 11a and 11b, but also all the components housed in these cases 11a and 11b are used as they are in common for the air conditioners with and without the independent rear seat control function. It is possible to reduce costs.

(Other Embodiments) In the above embodiment, an example of common use of parts with and without a rear seat independent control function has been described based on an air conditioner of front seat left / right independent control. The present invention is also applicable to the case where two types of air conditioners with or without the independent control function for the rear seats are manufactured based on an air conditioner which is not the left and right independent control (the front and the left and right air blowing air temperatures are the same). In this case, the partition walls 34 and 11d4 for dividing the air flow path into the driver's seat side and the passenger's seat are unnecessary, and accordingly, the front air mix door 20 and the actuator mechanism for driving the door 20 are reduced to one.

In the above embodiment, the lower case 11
Although the rear-seat outlet mode switching door 41 is arranged in c, the rear-seat outlet mode switching door 41 may be arranged near the rear-seat outlet. Also, air mix door 3 for rear seat
8 is disposed at a branch portion between a rear seat flow path 19 of the heater core 13 and a rear cold air bypass passage 32, and the rear air mixing door 38 allows the air passing through the rear seat flow path 19 and the rear air mixing door 38 to communicate with each other. The temperature of the air blown out to the rear seat side in the vehicle cabin may be adjusted by adjusting the ratio of the air flow to the air passing through the cold air bypass passage 32 for the seat.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an air conditioning unit of a vehicle air conditioner having a rear seat independent control function according to an embodiment of the present invention.

FIG. 2 is a diagram viewed from A in FIG.

FIG. 3 is a longitudinal sectional view of an air conditioning unit of a vehicle air conditioner having no rear seat independent control function in one embodiment of the present invention.

FIG. 4 is a view as viewed from B in FIG. 3;

FIG. 5 is a longitudinal sectional view of a conventional air conditioning unit having a rear seat independent control function.

FIG. 6 is a longitudinal sectional view of a conventional air conditioning unit having no independent rear seat control function.

[Explanation of symbols]

11a, 11b: Main body case, 11c, 11d: Lower case, 12: Evaporator (heat exchanger for cooling), 13: Heater core (heat exchanger for heating), 15: Cold air bypass passage for front seat, 20: Front seat Air mixing door, 25 ... Defroster opening, 26 ... Defroster door for front seat, 29 ... Face opening for front seat, 30 ... Foot opening for front seat, 31 ... Foot face switching door.

Claims (2)

[Claims] 1. A cooling heat exchanger for cooling air.
A heating heat exchanger (13) that is disposed substantially vertically downstream of the cooling heat exchanger (12) and heats air that has passed through the cooling heat exchanger (12); A cold air bypass passage (15) for the front seat, through which the cool air cooled by the heat exchanger (12) flows bypassing the heating heat exchanger (13); and a temperature passing through the heating heat exchanger (13). A front air mixing door (20) for adjusting a flow rate of the wind and the cold air passing through the front cold air bypass passage (15); and a hot air from the heating heat exchanger (13) and the front air mixing door. A plurality of front-seat outlet openings (25, 29, 30) through which air mixed with cool air from the seat cool air bypass passage (15) flows out.
And a front-seat outlet mode switching door (26, 31) for opening and closing the front-seat outlet opening (25, 29, 30). A main body case (11a, 11b, 12) for storing the upper side, the front seat air mix door (20), and the front seat blowout mode switching door (26, 31).
An air conditioner for a vehicle, wherein lower cases (11c, 11d) for accommodating a lower side of the heating heat exchanger (13) are detachably attached to a lower surface side of the heating heat exchanger (13). 2. A rear-seat cool air bypass passage (32) through which the cool air cooled by the cooling heat exchanger (12) flows bypassing the heating heat exchanger (13). A rear-seat air mix door (38) for adjusting the ratio of the amount of hot air passing through the air conditioner (13) to the amount of cold air passing through the rear-seat cold air bypass passage (32); and the heating heat exchanger (13). ) And a rear-seat outlet opening (43, 44) through which air mixed with hot air from the rear-seat cold air bypass passage (32) flows out, and the rear-seat cold air bypass passage ( 32) and the rear-seat outlet openings (43, 44) with the lower case (11c).
The vehicle air conditioner according to claim 1, wherein the rear air mix door (38) is formed in the lower case (11c).